Removes Chlorine Adds Minerals Natural Water Filter lasts for 6 months High quality stainless steel 1 binchotan active charcoal filters (6 months life) + 1 stainless steel coil vacuum foil packed individually pre-washed and ready to use Fits any* bottle (*minimum spout opening 30mm / 1.2in) Our charcoal is made from natural wood sticks and dimensions vary (15 to 28mm diameter, maximum length 118mm)